There are instructions available if you want to view various type of hidden files like .htaccess etc. but none for if you just want to see all files beginning with a “.”.

All you need to do is update your file pattern in Preferences > Advanced > Folder References. Change your file pattern to

!(/\.(?!.)[^/]*|\.(tmproj|o|pyc)|/Icon\r|/svn-commit(\.[2-9])?\.tmp)$